Meet Our Trainers

CMI Master Trainers

W. Marion Ivey

W. Marion Ivey is the founder and president/owner of Ivey’s Training and Consulting Services. Ivey has been providing technical professional training for the commercial and industrial cleaning industry in the United States since 1991, and internationally since July of 2002. Ivey launched his business internationally in the fall of 2002 by traveling to the United Arab Emirates (UAE) in the Middle East. Ivey provides technical certification training using CMI’s basic, advanced and train the trainer programs. Ivey has trained and certified cleaning professionals in Dubai, UAE; Abu Dhabi, UAE; and Doha, Qatar.

In the United States, Ivey has trained and certified thousands of cleaning professionals representing a broad range of facilities. Professionals from private/public school districts, college/universities, health care organizations, governments, private corporations, building service contractors (BSCs), and public/private libraries. 

Ivey’s background as a certified teacher enhances his ability to connect with people from many levels. As a teacher, Ivey understands the three basic learning styles of adults. This area of expertise allows Ivey to connect with his audience and provide an environment where the participants feel included. Ivey currently assists CMI with training curriculum updates and on-site certification training programs. Check out Ivey’s article in CMM Magazine here.

Mark Warner

Mark Warner held the former position of Education Manager for ISSA’s Cleaning Management Institute. Warner’s responsibilities with CMI include performing training events, as well as the ongoing development of CMI’s educational offerings including the program’s industry leading Certified Custodial Technician program. He has been involved in the cleaning industry for over 30 years and is a past member of the ISSA Board of Directors, holding the post of distributor director. Warner has also served as Division Chair for the IICRC’s Hard Surface Division, President of the Low Moisture Carpet Cleaners Association (LMCCA) and Vice President of The League of Hard Flooring Professionals. In addition, he has been an ISSA CIMS Certified Expert since the program’s inception.

Jeff Cross

Jeff Cross is the Executive Editor of Cleanfax, the leading media brand for the combined carpet cleaning and disaster restoration industries.

Although his career early in life was in the media as a reporter and photographer for a daily newspaper, he decided at the prompting of a close friend to start his own cleaning and restoration company and then sold it years later to return to journalism and take a position as editor. Cross calls his work with Cleanfax “a perfect fit” as he can relate to the industry because he has “made every single mistake there is with cleaning and restoration” and can help his audience avoid those same mistakes.

In addition to his work with Cleanfax, he is also an IICRC-approved technical trainer for the categories of carpet cleaning, furniture cleaning and color repair.

Cross is the creator of Totally Booked University, which provides cleaning and restoration business owners with marketing solutions for their companies. He is also a partner in the MarketingZoo, a content-generating service for cleaning and restoration websites, social media sites and other marketing platforms. He can be reached at or (740) 973-4236.

Mickey Crowe

Mickey Crowe of the Source America South Region office has been involved in the custodial industry for over 35 years and is recognized as a speaker, consultant, and trainer. He is a CMI Certified Master Train the Trainer recognized by CMI to conduct the Train the Trainer, Hard Floor Care, Carpet Care, Restroom Care, and Supervisor level workshops.

Mark Exner

Mark W. Exner began his career in the cleaning industry in 1974. While working towards a degree in law enforcement, he took a job in a hospital environmental services department. Performing all tasks from commode cleaning to sterilizing surgical rooms, Mark found the work hard but very rewarding. Unable to find a job opening in law enforcement, Mark continued to clean and eventually started his own cleaning business.

Shortly after that, Mark took some professional courses on cleaning just to see what he might not know about cleaning. His instructor amazed him on all the many important elements he had never been taught before, and he soon realized just how valuable the knowledge really was. He quickly learned the value of formal education in cleaning and realized that if the knowledge could help him that much, then he would like to instruct and inspire others, as well.

Currently, Mark instructs CMI’s Certified Custodial Technician and Train the Trainer programs, as well as courses in Carpet Cleaning, Upholstery Cleaning, and more. Mark’s warm and simple approach has inspired many, and his deep respect for his students has set a good example for the industry. Mark has gone on to become an educational product developer for the cleaning industry and he graciously welcomes your ideas for new course development.

Bill McGarvey

Bill McGarvey is the Director of Training and Sustainability for Imperial Dade, the leading independent distributor of foodservice packaging as well as facility maintenance supplies and equipment in the U.S., Puerto Rico, and the Caribbean. 

With over 40 years’ experience in the commercial cleaning industry, McGarvey is responsible for all aspects of customer training through the Imperial Dade Cleaning Institute, virtual as well as on site workshops, regulatory compliance seminars, and equipment in-service programs

Additional customer support is provided through activities such as troubleshooting and problem resolution, job assignment development, cost justifications, and program recommendations. Also, within this role, McGarvey monitors industry trends to develop new training or revise existing programs.

From 2010 through 2019, Bill delivered training to over 14,000 front line custodians, supervisors, and managers.

McGarvey is a CMI Master Trainer for the CMI Custodial Technician Certification Program and is certified as an official ISSA CIMS and CIMS-GB Certification Expert.

In the sustainability arena, McGarvey is a LEED Green Associate. He has conducted green cleaning awareness seminars for countless cleaning professionals and numerous green cleaning surveys for customers while helping develop pilot programs to move their operation in a more sustainable direction.

McGarvey has authored or contributed to numerous industry articles over the past two decades.

Earlier in his career, McGarvey worked for a major international contracted service provider, rising from an entry level position into management roles. Bill has also owned his own commercial cleaning and consulting firm.

Bill and his family reside in Lansdale, PA.

Perry Shimanoff

Perry Shimanoff is a former U.S. Marine Corps Infantry Officer (served during the Vietnam conflict). He has worked as a maintenance and operations cleaning consultant for the past 36 years, primarily with school districts, community colleges, universities, cities, and charter schools throughout the United States. Shimanoff has consulted with more than 500 clients, providing audit services, staffing assistance, and of course custodial training programs.

Shimanoff has completed a three-year tenure as the Vice-President of the International Custodial Advisory Network (ICAN), and participates as a member of the “Ask the Experts” forum for CMI. From 1995 through 2009, Shimanoff (with Griffin) was selected to be the custodial trainer for the California Association of School Business Officials (CASBO), with more than 15,000 custodians attending these workshops and seminars.

Shimanoff has contributed articles to a variety of trade journals (Cleaning and Maintenance Magazine, American School & University, Turf Maintenance, CASBO Quarterly Journal of Business, etc.) and is the author of two novels. As the founder of Management and Communication Consultants, his company has developed maintenance and custodial software used by hundreds of organizations. His approach to training is very simple: Clean Smarter, Not Harder.

Joel “Doc” Craddock

Joel “Doc” Craddock has over 30 years of experience in the commercial facilities maintenance industry. Joel has held positions as an area manager, special projects manager, operations manager, sales manager, regional director, and president with various companies over the years. Craddock has a strong passion to dramatically improve the quality and the health impact of professional cleaning services, through direct consultation on best practices, hands-on training, and ongoing support.

In addition to being a CMI-certified trainer for CMI’s Custodial Training Program and Supervisor & Management Boot Camp, Craddock is a speaker to groups and companies on various safety issues in the workplace, for owners, managers, and employees.

Craddock can be reached at or visit for more information. Click HERE to see what Joel has written for CMM Magazine.

William “Bill” Griffin

William “Bill” Griffin has over 30 years’ experience in the cleaning industry as a cleaner, consultant, trainer, and expert witness. He is the author of the Comprehensive Custodial Training ManualHow to Sell and Price Contract CleaningHow to Start and Operate a Successful Cleaning Business, and 10 other books and manuals, as well as over 300 articles on cleaning, maintenance, and self-employment.

He is a regular contributor to Cleaning & Maintenance Management magazine, Cleanfax magazine, and other industry publications and is a Master Trainer for Cleaning Management Institute. He is certified by the Institute of Inspection, Cleaning, and Restoration Certification (IICRC) as a Master Cleaner and is an active carpet and hard surface flooring inspector and approved IICRC instructor for carpet (CCT & CMT), stone (SMT), and hard floors (FCT).

Griffin has extensive experience as a consultant, expert witness, speaker and seminar leader to government agencies, manufacturers, associations and private businesses of all types and sizes throughout the world. He is an Assessor for ISSA’s Cleaning Industry Management Standard (CIMS) Green Building (GB) certification program. For more information, call Griffin at (206) 849-0179, email him at or visit

Sharon L. Cowan, CBSE

Sharon L. Cowan, CBSE, is a 25-year veteran of the cleaning industry and the former CEO of a multi-million dollar regional commercial and residential cleaning company. Cowan grew her company using her background in business development, strategic planning, national corporate leadership, and education. Cowan sold her company in 2000 to pursue coaching and consulting globally.

Cowan has been a guest speaker and seminar leader for industry trade groups, and has twice won marketing awards from BSCAI. In addition to one-on-one coaching internationally, Cowan conducts workshops throughout the United States, teaching commercial cleaning business owners how to maximize profits and grow their businesses. Often called a turnaround specialist, Cowan holds a bachelor of science degree from Eastern Michigan University.

Cowan is on staff at Indian River State College and serves on the board of directors for Cleaning For A Reason. Cowan has been designated a CBSE (Certified Building Service Executive) by the BSCAI. She is also an industry expert for several online janitorial sites and has authored industry eBooks, white papers, training programs, and the BSC University Series.

Cowan can be reached at (772) 563-7320 or Email:

Carl C. Bowman

Carl C. Bowman has over 25 years of experience in the cleaning industry as a cleaner, trainer and consultant. While at Ohio State University, Bowman worked as a facility manager, carpet and hard floor care technician, and as Director of Environmental Services for the Office of Student Life.

Bowman participated in the planning of new building projects with an emphasis on staffing and resourcing the environmental staff. Bowman established a training program for supervisor and front line staff. Carl is a CMI Certified Master Trainer and Consultant.

Bowman has participated in online seminars, articles and as a resource to multiple trade publications.

For more information, contact Bowman directly at